refactor(params,core): centralize fork activation in ChainConfig#2329

gzliudan wants to merge 1 commit intoXinFinOrg:dev-upgradeXinFinOrg/XDPoSChain:dev-upgradefrom

gzliudan:move-common-global-vargzliudan/XDPoSChain:move-common-global-varCopy head branch name to clipboard